As the high-stakes criminal investigation into Telegram nears its second year with no resolution in sight, French authorities have again summoned Telegram co-founder Pavel Durov for questioning. Durov spent around six hours being questioned at the Paris Judicial Tribunal on Wednesday, local media reported, citing law enforcement sources. He's allowed to travel internationally, and to live at his home in Dubai - though he's agreed specific judicial supervision rules, part of which is to periodically return to France when summoned.